US11376817B2ActiveUtilityA1
Wear resistant articles and applications thereof
Est. expiryJul 30, 2039(~13.1 yrs left)· nominal 20-yr term from priority
B22F 1/10Y10T428/12576B32B 15/16B32B 5/16C22C 29/08B32B 2250/03B32B 2311/30B32B 2260/04C22C 38/08B32B 2307/302B22F 7/08B32B 2264/107B32B 2313/04B32B 7/027Y10T428/12937B32B 2307/554B32B 2260/02B32B 2311/22B32B 2260/025B32B 15/18B32B 15/013B32B 2307/30B22F 2998/10B32B 2315/02B32B 18/00C22C 38/105B32B 2571/00B32B 2307/732C22C 19/07B32B 2305/80B32B 7/05Y10T428/12757C22C 19/03B22F 2999/00B22F 2203/05C22C 1/0433
49
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0
Cited by
35
References
15
Claims
Abstract
Wear resistant articles are described herein which, in some embodiments, mitigate CTE differences between wear resistant components and metallic substrates. In one aspect, an article comprises a layer of sintered cemented carbide bonded to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation:x=(CTEWC-CTEMMC)(CTEMMC-CTEFe)wherein 0.5≤x≤2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide, metal matrix composite, and iron-based alloy in 1/K respectively at 900° C. to 1100° C.
Claims
exact text as granted — not AI-modifiedThe invention claimed is:
1. An article comprising:
a layer of sintered cemented carbide bonded to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation:
x
=
(
C
T
E
WC
-
C
T
E
M
M
C
)
(
C
T
E
M
M
C
-
C
T
E
Fe
)
wherein 0.5≤x≤2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide layer, metal matrix composite layer, and iron-based alloy layer in 1/K respectively at 900° C. to 1100° C.
2. The article of claim 1 , wherein (CTE Fe−CTE WC) is 2 to 6×10 −6 1/K.
3. The article of claim 1 , wherein (CTE Fe−CTE WC) is 3 to 5×10 −6 1/K.
4. The article of claim 1 , wherein the layer of sintered cemented carbide is free of cracks.
5. The article of claim 1 , wherein the coefficients of thermal expansion increase in a direction from the sintered cemented carbide to the iron-based alloy, such that CTE Fe>CTE MMC>CTE WC.
6. The article of claim 1 , wherein metallic binder is present in an amount of 6 to 25 weight percent of the sintered cemented carbide layer.
7. The article of claim 1 , wherein the iron-based alloy layer comprises nickel in an amount of 25-35 weight percent and cobalt in an amount of 6-25 weight percent.
8. The article of claim 1 , wherein the layer of sintered cemented carbide has thickness greater than 5 mm.
9. The article of claim 1 , wherein hard particles are present in the metal matrix composite bonding layer in an amount of 30 to 60 weight percent, the hard particles comprising metal carbides, metal nitrides, metal carbonitrides, metal borides, metal silicides, cemented carbides, cast carbides, intermetallic compounds, or mixtures thereof.
10. The article of claim 9 , wherein the hard particles comprise tungsten carbide particles.
11. The article of claim 1 , wherein the metal matrix composite bonding layer comprises nickel-based matrix alloy.
12. The article of claim 1 , wherein the metal matrix composite bonding layer comprises cobalt-based matrix alloy.
13. A method of making a layered article comprising:
bonding a layer of sintered cemented carbide to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation:
x
=
(
C
T
E
WC
-
C
T
E
M
M
C
)
(
C
T
E
M
M
C
-
C
T
E
Fe
)
wherein 0.5≤x≤2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide layer, metal matrix composite layer, and iron-based alloy layer, metal matrix composite, and iron-based alloy in 1/K respectively at 900° C. to 1100° C.
14. The method of claim 13 , wherein bonding the layer of sintered cemented carbide to the layer of iron-based alloy comprises positioning a sheet between the sintered cemented carbide layer and the iron-based alloy layer to provide a layered assembly, the sheet comprising a mixture of hard particles and powder cobalt-based alloy or powder nickel-based alloy, the hard particles comprising metal carbides, metal nitrides, metal carbonitrides, metal borides, metal silicides, cemented carbides, cast carbides, intermetallic compounds, or mixtures thereof.
15. The method of claim 14 further comprising heating the layered assembly to sinter or melt the powder cobalt-based alloy or powder nickel-based alloy, thereby forming the metal matrix composite layer bonding the sintered cemented carbide layer to the iron-based alloy layer.Cited by (0)
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